Move settings from appsettings to infrastructure

**Describe the improvement you would like to see**
Instead of specifying the key vault locations and urls to our services in appsettings.Env.yaml, move these to the infrastructure settings.

**How will this change existing functionality?**
Gather the operational settings in one place, and keep this repo less Equinor specific

**How will this improvement affect the current Threat Model?**
N/A